Scout Pro Service Manual
Contents
1. us LCD DISPLAY e C4 a us CAL ES Figure 3 4 Transducer Removal 3 Disconnect Connector J6 coming from Transducer 8 4 Install the replacement Transducer using the 4 screws previously removed and connect the Transducer flexible cable to connector J6 on the Printed Circuit Board 5 Reassemble the balance 6 See Appendix A Service Tools Instructions and load temperature compensation data 7 Recalibrate the balance in accordance with instructions in Appendix B Factory Calibration B 2 8 Check the performance of the balance 3 4 CHAPTER 4 TESTING 4 1 TESTING Before servicing the balance an operational test and various performance tests should be made to ascertain whether or not the balance meets specifications Turn the balance on and allow it warm up for at least five minutes before performing these tests Make sure the test area is free from drafts and thatthe balance rests on a level and vibration free surface The masses used for final calibration must be adjusted to ASTM Class 4 tolerance or better 4 1 1 Operational Test 1 Connect a functioning AC Adapter to the balance Power Jack located at the rear of the balance 2 Plug the AC Adapter into a suitable power source If the AC Adapter supplied with the balance is rated for a different voltage use an appropriate adapter to match the supply voltage 4 1 2 Segment2. Figure 4 A 3 APPENDIX A SERVICE TOOL INSTRUCTIONS A 5 USING CONFIGTOOL EXE CONT 2 Ifthe communications parameters have to be set click on the Com Porttab andthe screen shown in Figure A 5 will appear Adjust the parameters as required to match the balance El ScoutPro Service Tool x Config Test Command port m Settings Port com 1 Baudrate 2400 y ByteSize Parity one y DK Figure 5 3 When the communications parameters are matched click on the Test Command tab and test the communications 4 inthis example see figure A 6 the P command resulted in the 0 029 being written in the lower screen The V command resulted in Sr 1 10 being written The T command had the effect of zeroing the balance and the last P command resulted in the 0 00g being written If the balance does not reliably communicate the problem must be fixed before continuing E ScoutPro Service To OOO yyy Config Test Command com port Figure A 6 A 4 APPENDIX A SERVICE TOOL INSTRUCTIONS A 5 USING CONFIGTOOL EXE CONT 5 When communications are reliable return to the Config tab Press the read button A and the data will be read from the balance See Figure A 7 Config Test Command COM port User Enable Unit Fet Ge JE Heatm MOr I wt Polite gt Pe Poe Custom quotiety Unit T select ose r User Menu Related
3. OHAUS SERVICE MANUAL SCOUT PRO BALANCES Ohaus Corporation 19A Chapin Road P O Box 2033 Pine Brook NJ 07058 2033 973 377 9000 OHAUS SERVICE MANUAL SCOUT PRO BALANCES The information contained in this manual is believed to be accurate at the time of publication but Ohaus Corporation assumes no liability arising from the use or misuse of this material Reproduction of this material is strictly prohibited Material in this manual is subject to change O Copyright 2003 Ohaus Corporation all rights reserved Registered trademark of Ohaus Corporation TABLE OF CONTENTS CHAPTER 1 INTRODUCTION FARA 1 1 ee 1 1 12 Service FACIES ui ida 1 1 1 3 Tools and Test Equipment Required 1 2 1 3 1 Special Tools and Test Equipment List ii 1 2 132 Standard Tools and Test Equipment Lisi e 1 2 1 4 Test Masses ReQquirSd aueh u 1 2 13 SPECIICAlONS m AS 1 3 CHAPTER 2 DIAGNOSIS di TroublBehoelndg susi 2 1 22 Diagnostic ela 2 1 A ae 2 1 23 Error ONS artes 2 4 CHAPTER 3 REPAIR PROCEDURES spl Repair een 3 1 EET MILI SEE 3 1 3 1 2 Printed Circuit Board Replacement iioc renta rr nein ba cir rin 3 2 3 1 3 Transducer Replacement ioci anne 3 4 CHAPTER 4 TESTING 41 ile 4 1 El Operation Test mrt 4 1 43 2 Segment Display Test sont 4 1 L2 Pellormanes Tests sust
4. 2 Select a mass weighing near the maximum capacity of the balance and place the mass on the center of the Pan 1 Observe and record the reading 3 Remove the mass Reading should return to Og 1 count 4 Repeat this test for ten readings If the standard deviation of the readings is less than 1 count the balance passes the Repeatability Test Adjustment If the deviation for any set of readings using the same mass placed on the center of the Pan is greater than 1 count the balance does not meet the Repeatability Test specification Inspect and correct the following areas 1 Check for mechanical obstructions Any foreign object touching any part of the moving Pan can cause a balance to fail the Repeatability Test Inspect and correct as necessary 2 An error inthe Off Center Load Test can affect the results of the Repeatability Test Inspect and correct if necessary See Off Center Load Test 3 Foreign material or debris located in the balance between the Pan 1 and the Top Cover 6 can cause the balance to fail the test 4 Environmental influences such as vibrations drafts or a non level surface can also cause failures 5 Ifthe balance fails the test refer to table 2 1 Diagnostic Guide for assistance 4 2 CHAPTER 4 TESTING 4 2 2 Off Center Load Test The Off Center Load Test is used to determine whether displayed weight values are affected by moving the sample to different areas of the Pan 6 Test 1 Pl
5. O OUI Je PS nm 11 Enter the Windows Control Panel and click on the System Icon Click on the Hardware tab Click on the Device Manager button Expand Ports COM amp LPT Right Click on USB Serial Port COM5 and choose Properties Click on the Port Settings tab Click on the Advanced button Change the COM port number to an unused port Click on OK twice Close the System Properties box Close the Control Panel Window The virtual port will now be the com port you selected A 5 USING CONFIGTOOL EXE Ti Open ConfigTool exe you will see the screen shown in Figure A 4 after the communica tions parameters have been checked If the communications parameters are not matched or there is no balance connected error messages will appear If a balance is connected it will be read automatically and the data will appear El 2272 x Config Test Conmand COM port User Enable Unit Tice Newton I Oz 0 Det Lb Pe I Pe enh Custom divisor quotiety Unit T select y User Menu Related Sample size Auto Off Power On Unit AZT Mode y Stability y 85232 Menu Related Bandrate Y I Ser Enable Parity Y Handshake y Auto Print y Print Stable Serial Number C Scale Loadcell OK 0 7 59 20 00 60 00 83 35 100 50 00 Model ET Reset Cal Lin Read Update Quit
6. Refer to Figure 5 1 Before disassembling the balance it should be noted that components inside of the balance are delicate and need to be handled with care It is imperative that the Transducer 8 should never be subjected to any excessive torque stress or abrasion as damage may result Once the balance has been disassembled any small scratch or abrasion made to any of the Individual Strain Gauges will render the entire Transducer 8 unusable The Printed Circuit Board 9 contains integrated circuits which employ CMOS technology therefore caution must be exercised so as not to subject any of these components to static electricity discharge When servicing a wrist Ground Strap with a 10 Megohm series resistor to earth ground is highly recommended The Printed Circuit Board 9 should be handled by grasping the edges only and never placing fingers on any of the runs or traces 3 1 1 Cover Removal To disassemble the balance proceed as follows 1 Turn the balance off and if using an AC Adapter disconnect it from the balance 2 Remove the Pan 1 2 or 3 from the balance Pan sizes and shapes vary 3 Place the Shipping Lock in the locked position See Figure 3 1 This will help protect the Transducer Unlocked Position Figure 3 1 Shipping Lock 4 Ifabattery is being used turn the balance over and remove the Battery Compartment Cover 12 as shown in Figure 3 2 Cover Screws Figure 3 2 Bottom of Balance 3 1 C
7. Display Test 1 Turn the balance on by pressing ON ZERO Off all segments are enabled and displayed briefly then followed by a software revision number See Figure 4 1 for full display 2 Tare the balance The display should indicate a zero weight 51 III DEN DODO Figure 4 1 LCD Full Display 4 2 PERFORMANCE TESTS Accurate performance of a Scout Probalance is determined by a series of three performance tests The displayed readings are compared with the tolerances listed in Table 4 1 Tolerance values are expressed in counts A one count change is equal to the last digit shown on the balance display TABLE 4 1 TYPES OF PERFORMANCE TESTS LPEBFORNMANGE es TEST REFRANES 4 1 CHAPTER 4 TESTING 4 2 PERFORMANCE TESTS CONT The following performance tests are used to evaluate the balance operation before and after repairs Each balance tested must meet the requirements specified in each test as well as the specifications listed in Table 1 2 Tolerance values are expressed in counts A balance which passes each ofthese three tests meets the manufacturing specifications 4 2 1 Repeatability Test Repeatability is a word used in balance specifications meaning the Standard Deviation of a set of similar weight readings To determine whether a balance meets the calculated Standard Deviation value in the Specification Table 1 2 perform the following test Test 1 Tare the balance The reading on the display should be 00
8. Extract the files in ScoutPro Tools zip into C ScoutPro 5 Copythe file service txt into the C ScoutPro if required 6 You may want to put a shortcut on your desktop for easier access A 1 APPENDIX A SERVICE TOOL INSTRUCTIONS A 3 HARDWARE INSTALLATION NOTE The optional interface must be modified so that the EEPROM may be written to 1 Remove the screw and the housing as shown in Figure A 1 Figure A 1 Screw and Housing Removal 2 Locate J3 on the interface board See Figure A 2 3 Short the two pins of J3 see Figure 4 Replace the interface housing 5 Install the modified RS232 USB module in the balance being repaired NOTE If using the customers interface do not forget to remove the modification after the repair is complete 6 Plug the interface cable into the PC pa Figure A 3 Connector J3 Shorted 7 Make sure the communications parameters match The parameters in the tools are e Baud 2400 e Parity 7 None e Handshake None 8 Make sure the balance A off feature under the S E T U P menu is set to OFF if this setting is left ON the balance will shut off during the re configuration A 2 APPENDIX A SERVICE TOOL INSTRUCTIONS A 4 SPECIAL INSTRUCTIONS FOR USB INTERFACE After installing the interface using the instructions that come with the kit the COM port will have to be changed The interface uses COM 5 as a default Config Tool only recognizes COM 1 to COM 4 1
9. Scout Pro All Adapter 230V AU Scout Pro All Adapter 240V UK Scout Pro All Adapter 230V EU Scout Pro All Adapter 100 120V US Scout Pro All 5 4 APPENDIX A SERVICE TOOL INSTRUCTIONS A SERVICE TOOLS INSTRUCTIONS This tool is required when either a main PC board or a transducer is replaced in a Scout Pro balance It is used to re configure the balance to it s old parameters in the case of a board replacement or new parameters in the case of a transducer replacement A 1 REQUIREMENTS FOR SCOUT PRO TOOLS e VGA 640x480 or higher resolution screen Microsoft Windows NT 4 0 or later or Microsoft Windows 98 or later e Scout Pro RS232 Interface Kit or USB interface Kit Scout Pro instruction manual Scout Pro Tools zip A 2 SOFTWARE INSTALLATION 1 If you need the software it can be downloaded at the following URL HTTP fileshare ohaus com docushare a Click on Login b Login ServiceA Password aservice Both are case sensitive c Click on the Xerox logo at the upper left d Click on Technical Support e Click on Service Notes f Click on Authorized Service Centers g Click on Scout Pro Tools h Download all 3 files 2 Create a folder in the C drive and name it ScoutPro If you choose another directory you will have to open the file toledo ini and modify the path to the service txt file to agree with the folder name and path you have chosen 3 Copy the file ScoutPro Tools zip into C ScoutPro 4
10. This service manual contains the information needed to perform routine maintenance and service on the Ohaus Scout Pro Balances The contents of this manual is contained in five chapters and are listed as follows Chapter 1 Introduction Contains information regarding service facilities tools test equipment calibration masses and specifications Chapter 2 Diagnosis Contains a diagnostic guide for troubleshooting problems and error code tables Chapter 3 Repair Procedures Contains disassembly assembly and replacement procedures Chapter 4 Testing Contains an operational test a segment display test and performance tests Chapter 5 Drawings and Parts Lists Contains an exploded view drawing and a parts list Before servicing the balance you should be familiar with the Instruction Manual which is packed with every balance The procedures in this manual assumes the technician performing them has a working knowledge of the use of standard hand tools and the repair of precision instruments 1 2 SERVICE FACILITIES To service the Scout Pro balances the service area should meet the following requirements e Should be temperature controlled and meet the balance specifications for temperature environmental requirements See specifications for temperature ranges of the various models e Must be free of vibrations such as fork lift trucks close by large motors etc Must be free of air currents or drafts from air conditioning heating
11. and use care when handling components of the balance 2 2 DIAGNOSTIC GUIDE Table 2 1 is a diagnostic guide designed to help locate the problem area quickly and easily To use the table first locate the symptom that you are observing Followthe symptom column and review the probable cause column and remedy column The probable causes are listed with the most common cause first If the first remedy does not fix the problem proceed on to the next remedy Before attempting to repair the Balance read all chapters of this manual to familiarize yourself with the balance components and operation Do not attempt repairs unless you fully understand the operation of the balance 2 2 1 Diagnosis 1 Isolate and identify the symptom 2 Refer to Table 2 1 Diagnostic guide and locate the symptom 3 Follow the suggested remedies in the order that they appear 4 Perform the indicated checks or see the appropriate section of the manual 5 Repair or replace the defective section of the balance NOTE If more than one symptom is observed it is necessary to approach one area at a time and also remember that the symptoms may be interrelated In the event that erratic or fluctuating weight readings are observed it is necessary to isolate the problem to either the mechanical area or the electronic area of the balance The repeatability test will quickly point out whether the Transducer 8 is operating properly or whether the problem is due to an electronic
12. replacement 4000g Scout Pro SP4001 SPX4001 Kit Transducer replacement 12000 Scout Pro Kit Transducer replacement 600g Scout Pro SPx01 SPXx01 Kit Transducer replacement 400g Scout Pro SP402 SPX402 Kit Transducer replacement 2000 Scout Pro SP202 SPX202 Kit Transducer replacement 120g Scout Pro SP123 SPX123 Kit PCB w LCD replacement Full Bridge Hi Scout Pro For 120g 400g 4000g SP123 SPX123 SP402 SPX402 SP401 SPX401 Kit PCB w LCD replacement Half Bridge Scout Pro For 600g 6000g SPx01 SPXx01 SP6000 SPX6000 Kit PCB w LCD replacement Full Bridge Lo Scout Pro For 200g 1200g 2000g SP202 SPX202 JS1200 SP2001 SPX2001 5 3 CHAPTER 5 DRAWINGS AND PARTS LISTS TABLE 5 1 REPLACEMENT PARTS LIST Cont 71164070 71160301 71160412 71160305 71160303 71160304 71147994 71160313 71160323 12102033 71160309 71160413 71160311 71160312 12102323 12102322 12102321 12102320 Base w threaded inserts Scout Pro SPGxxx SPSxxx SPxxxN Base Scout Pro All with fixed feet Adjustable feet with rubber pad Scout Pro SPGxxx SPSxxx SPxxxN Foot Non adjustable Scout Pro All Battery cover Scout Pro All Interface cover Scout Pro All LCD Scout Pro All Cal Lock Scout Pro All Connector Battery Scout Pro All Weigh Below cover Scout Pro All Lock sub platform Scout Pro All Level Scout Pro SPGxxx SPSxxx SPxxxN LCD support Left Scout Pro All LCD support Right
13. E Cont SYMPTOM PROBABLE CAUSE REMEDY 4 Defective Transducer 4 Replace Transducer 5 PC board defective 5 Replace PCB 1 Defective Transducer 1 Replace Transducer Displays Err2 Cont Exceeds off center load limit Inaccurate readings Fluctuating readings Drifting display 1 Improper calibration Span or Linearity 2 Not zeroed before weighing Defective Transducer PC Board defective Unstable environment Debris in balance PC Board defective Defective transducer Transducer Lock en gaged or misaligned Balance not warmed up Defective Transducer PC Board defective 1 Perform linearity calibra tion 2 Press Zero On with no weight on the Pan then weigh Replace Transducer Replace PC Board Check area for vibrations leveling and drafts Disassemble and clean if necessary Replace PC Board Replace Transducer Unlock or realign Allow balance to stabi lize Replace Transducer Replace PC Board Error code Err on display Balance has detected an error condition 2 Defective Transducer 3 PC Board defective 2 3 See Table 2 2 Error Codes Replace Transducer Replace PC Board CHAPTER 2 DIAGNOSIS TABLE 2 1 DIAGNOSTIC GUIDE Cont SYMPTOM PROBABLE CAUSE RS232 Not functioning wa models equipped with 232 tings 2 RS232 not turned on 3
14. HAPTER 3 REPAIR PROCEDURES 3 1 1 Cover Removal Cont 5 Remove the 4 AA batteries from inside the battery compartment and replace the Battery Compartment Cover 12 6 Slide the Lockswitch to to the unlocked position to gain access to one of the cover screws Remove the 3 Cover Screws as shown in Figure 3 2 7 Turn the balance over in an upright position and carefully lift the Top Cover 6 from the balance Base 10 8 After repairs and or adjustments have been made reassemble the balance in the reverse order 3 1 2 Printed Circuit Board 9 Replacement In an effort to keep service costs down it is suggested that if the Printed Circuit Board 9 is suspected of being faulty it should be replaced rather than repaired To replace the Printed Circuit Board 9 proceed as follows 1 Remove the balance cover refer to paragraph 3 1 1 CAUTION WHEN HANDLING THE PRINTED CIRCUIT BOARD HANDLE BY EDGES ONLY DO NOT TOUCH FOIL SIDE OF BOARD STATIC DISCHARGE MAY DAMAGE SOME COMPONENTS 2 The Printed Circuit Board 9 is fastened in place by 2 clips which are part of the Base 10 and 2 screws located on top of the Printed Circuit Board In addition a Calibration Lock 15 small plastic piece is positioned at the front of the Printed Circuit Board See Figure 3 3 10 BASE J6 CONNECTOR CLIP T T xi EUR CLIP J2 BATTERY je rom S J11 RS232 CONNECTOR CON
15. NECTOR Wee a 16 MOUNTING MOUNTING SCREW 9 15 SCREW PCB CAL LOCK Figure 3 3 Printed Circuit Board Removal 3 2 CHAPTER 3 REPAIR PROCEDURES 3 1 2 Printed Circuit Board 9 Replacement Cont 3 When an RS232 option is installed remove the RS232 Connector from J110n the Printed Circuit Board 9 Disconnect the Transducer cable from Connector J6 on the Printed Circuit Board 9 Disconnect the battery cable from Connector J2 on the Printed Circuit Board 9 Remove the 2 mounting screws on top of the Printed Circuit Board 9 Push the Printed Circuit Board towards the back as far as it will go and apply a small forward pressure to the Cal Lock 15 Lift up on the front of the Printed Circuit Board 9 to remove it Install the new Printed Circuit Board 9 Make sure that the Printed Circuit Board is positioned under the 2 clips on the Base 10 Connect the flexible cable from the Transducer to Connector J6 on the Printed Circuit Board 9 10 Connect the RS232 to Connector J11 on the Printed Circuit Board 9 if the RS232 is installed 11 Connect the battery cable to connector J2 on the Printed Circuit Board 9 12 Replace the 2 mounting screws on top of the Printed Circuit Board 9 make sure the board is positioned as far forward as possible to ensure the calibration lock switch will operate properly 13 Reassemble the Bala
16. RS232 does not stay on 4 Loose or disconnected RS232 option 5 RS232 option defective 2 3 ERROR CODES Scout Pro balances are equipped with software which will display an error condition when it occurs Table 2 2 Error Codes describes the various error codes which can appear on the display and specifies the probable reason and remedy 1 Improper Print Menu set 1 Check all settings Menu item Power must be set to ON 2 Turn the option on See instruction manual 3 If batteries are being used the RS232 turns off when the unit is turned off Either turn the option on or use the ac adapter 4 Check connection 5 Replace RS232 option TABLE 2 2 ERROR CODES DISPLAY REASON ACTION Err 1 Invalid checksum data 1 Perform factory calibration 2 Restore data file 3 Check transducer 4 Check PCB Err2 Overload or Underload 1 Make sure the right pan is on the balance 2 Perform service LIN calibration per B 1 3 Check transducer 4 Check PCB Err 4 Incorrect calibration mass 1 Calibrate using correct mass Err5 Parts counting error 1 Sample is less than 1d Change sample quantity or increase sample Err8 RS232 buffer is full 1 Check printing device Err9 Internal data error 1 Restore data file 2 Check PCB 3 Check transducer 2 4 CHAPTER 3 REPAIR PROCEDURES 3 1 REPAIR PROCEDURES This section of the manual contains detailed disassembly procedures of the balance
17. Repeatedly press and release the PRINT Unit button until the display shows END Press and release the On Zero Off button The balance will return to the weighing mode B 2 FACTORY CALIBRATION This calibration must be used when either a PC board or a transducer is replaced 1 2 Remove power from the balance Install an RS232 option with the pins shorted See Appendix If the RS232 option is not available pins 2 and 7 of IC9 may be shorted using a micro alligator clip See Figure B 1 CAUTIONS 1 Be very careful that no other pins are shorted this could destroy the IC 2 Do not attempt to solder the jumper B 1 APPENDIX B FACTORY CALIBRATIONS B 2 FACTORY CALIBRATION CONT E S PDS SF J6 O PIN 24 PPIN 7 IC U9 LCD DISPLAY CAL Figure B 1 IC U9 Connections You may need to use some kind of draft shield since the top cover has to be left off Apply power to the balance Start with the unit off Press and hold both the ON ZERO Off and the PRINT Unit buttons until the display reads rAMP Press and release the PRINT Unit button The display will show Lin Press and release the ON ZERO Off button The display will show C blinking and then the first mass value Place masses totaling this value on the balance and press the ON ZERO Off button Press and release the ON ZERO Off button The display will show C blinkin
18. Sample size 10 pes y Auto ose Power On Unit c 0 5 d Y Mode ose z ri Stability 1d zl RS232 Menu Related Bandrate 2400 Ser Enable Parity T None v Handshake None Auto Print fore Print Stable Serial Number T Scale Loadcell 0K 49 85 Figure A 7 6 Ifthe PC Board has been replaced refer to 7 Ifthe load cell was replaced follow the same procedure as above except enter the load cell serial number and click on Load cell C in the serial number box 8 The bar G is a graphical indication of the portion of the transducer output that is being used A 6 USING CONFIG TOOL AFTER REPLACING THE MAIN PC BOARD 1 Using ConfigTool after a new Main PC board has been installed make sure the balance lockout switch is in the unlocked position 2 Install an RS232 option with the factory jumper J2 on the RS232 option in the balance 3 The AC adapter must be used 4 Turn the balance on A 5 APPENDIX A SERVICE TOOL INSTRUCTIONS A 6 USING CONFIG TOOL AFTER REPLACING THE MAIN PC BOARD CONT The balance displays Err 9 Start the ConfigTool software see A 5 An error message will be displayed User Enable Units amp User Variable Check Sum Verify Error click on OK Set RS232 to the correct com port Baudrate 2400 ByteSize 7 Parity None The balance will respond to the V command but not the others The bar graph will resp
19. ace 1 2 of the balance capacity in the center of the Pan 1 2 Note the reading 3 Move the mass halfway between the center and the edge to the front ofthe Pan 1 Note any differences in the displayed weight reading 4 Repeat this test for the back left and right positions of the Pan 5 Maximum allowable change in displayed weight readings is 2 count for each of the four positions If this reading is exceeded it usually indicates a defective Transducer 8 4 2 3 Linearity Test This test is used to determine the linearity of the unit throughout its operating range The masses used to perform this test must be adjusted to ASTM Class 4 Tolerance or better NOTE The balance must pass the Off Center Load Test and Re peatability Test before the Linearity Test may be performed Test Loads do not have to be test weights They can be anything that totals the load value The test mass can be anything that weighs near the test mass value TABLE 4 2 TEST MASSES Capacity Test mass Load 1 Load 2 Load 3 Load 4 200g 1g 50g 100g 150g 190g 400g x 0 01 1g 100g 200g 300g 390g 400g x 0 1 5g 100g 200g 300g 400g 600g 5g 150g 300g 450g 600g 2000g 5g 500g 1000g 1500g 2000g 4000g 5g 1000g 2000g 3000g 4000g 6000g 10g 1500g 3000g 4500g 6000g 1 Place the test mass on the balance record the weight and then remove 2 Place Load 1 on the balance and press the ON ZERO Off button 3 Place the test mass on the bal
20. ance record the weight and then remove 4 Place Load 2 on the balance and press the ON ZERO Off button CHAPTER 4 TESTING 4 2 3 Linearity Test Cont Test Cont 5 Place the test mass on the balance record the weight and then remove 6 Place Load 3 on the balance and press the ON ZERO Off button 7 Place the test mass on the balance record the weight and then remove 8 Place Load 4 on the balance and press the ON ZERO Off button 9 Place the test mass on the balance record the weight and then remove 10 The difference in the weights of the test mass should be within the tolerance in table 4 1 If not perform a linearity calibration see Appendix B and do the test again 4 3 Down Stop Adjustment When the balance fails the Off Center Load test and or the Linearity test the Transducer may require checking and adjusting of the down stop To make adjustments the Transducer must be removed from the balance Perform procedures 3 1 1 and 3 1 3 and remove the Transducer from the balance NOTE This procedure will require feeler gauges ranging from 0 40mm 0 16in to 0 65mm 0 026in Checking and adjusting the down stop 1 Place masses equaling mass 1 as indicated in Table 4 3 on the platform You should still be able to feel some movement with a slight downward push 2 Place masses equaling mass 2 as indicated in Table 4 3 on the platform You should feel no movement with a slight downward push 3 Ifthe above conditions are no
21. antivo 4 1 4 2 1 Bepestabllily TOL au duo tina ia 4 2 42 2 Off Center Load Testori iii bei 4 3 4 23 Lineanty A A 4 3 43 CDOWmotop AdUSINCIE aaa 4 4 CHAPTER 5 DRAWINGS AND PARTS LISTS 5A IDEA WIN di 5 1 5 2 Pans Liste 5 3 APPENDIX A SERVICE TOOL INSTRUCTIONS A Sevice Tools Ihsirlielians re A 1 A 1 Requirements for Scout Pro Tools u nu A 1 A2 Solware Insrallallgb die A 1 AS Hardware Installation ass a li A 1 AA Special Instructions for USB Interface nennen A 2 AS Using dre quietos Nus cR Tm A 3 AB Final Service Calibration eiii A 5 APPENDIX B FACTORY CALIBRATIONS B TABLE NO 1 1 Calibration Points 1 2 Specifications 2 1 Diagnostic Guide 2 2 Error Codes 4 1 4 2 Test Masses 4 3 Test Mass Values 4 4 5 1 Replacement Parts List FIGURE 3 1 Shipping Lock 3 2 Bottom of Balance 3 3 3 4 Transducer Removal 4 1 LCD Full Display 4 2 5 1 A 1 A 2 Connector J3 Location A 3 Connector J3 Shorted A 4 Screen 1 A 5 Screen 2 A 6 Screen 3 A 7 Screen 4 B 1 IC U9 Connections Factory Calibrations B 1 Service Calibration B 2 Factory Calibration Types of Performance Tests Transducer Front View Down Stop Adjustment Scout Pro Exploded View Screw and Housing Removal LIST OF TABLES TITLE LIST OF ILLUSTRATIONS TITLE Transducer Adjustment Tolerances Printed Circuit Board removal CHAPTER 1 INTRODUCTION 1 1 INTRODUCTION
22. chnician will be available to provide assistance Outside the U S A please contact Ohaus Corporation 19 Chapin Road Pine Brook NJ 07058 USA www ohaus com Tel 973 377 9000 Fax 973 593 0359 5 1 CHAPTER 5 DRAWINGS AND PARTS LISTS Figure 5 1 Scout Pro Exploded View 5 2 5 2 PARTS LISTS This section of the manual contains the replaceable parts for the Scout Pro Balances KEY NO OO N QO Ci dI A OQO CHAPTER 5 DRAWINGS AND PARTS LISTS TABLE 5 1 REPLACEMENT PARTS LIST PART NO 71160314 71160308 71154611 71147378 71160395 71160346 71160302 71160347 71160477 71160408 71160407 71160406 71160405 71160404 71160403 71160402 71160411 71160410 71160409 DESCRIPTION Square Pan 6 5 x 5 5 SS Scout Pro SPx01 SPxx01 SPxx00 SPXx01 SPXxx01 SPXxx00 Pan Support 6 5 x 5 5 Square Scout Pro SPx01 SPxx01 SPxx00 SPXx01 SPXxx01 SPXxx00 Round pan Assy 4 7 120mm dia SS Scout Pro SPx02 SPXx02 Specific Gravity Kit Scout Pro SPExxx Function Label Scout Pro SPExxx Function Label Scout Pro All but SPExxx Top Cover Scout Pro All Wire Assembly Power Scout Pro All Kit Transducer replacement 2000g Scout Pro SP2001 SPX2001 Kit Transducer replacement 6000g Scout Pro SP6001 SPX6001 Kit Transducer
23. ducts open windows people walking by fans etc Area must be clean and air must not contain excessive dust particles e Work surface must be stable and level e Work surface must not be exposed to direct sunlight or radiating heat sources i3 CHAPTER 1 INTRODUCTION 1 3 TOOLS AND TEST EQUIPMENT REQUIRED In order to properly service the Scout Pro balances certain Ohaus special tools and test items are required in addition to standard electronic tool kits These items are listed as follows 1 3 1 Special Tools and Test Equipment List 1 Alternate voltage Power Adapter if local power requirements do not match Balance Adapter voltage ratings 2 Scout Pro RS232 option PN 71147376 3 APC running Microsoft Windows NT 4 0 or later or Microsoft Windows 98 or later 3 Scout Pro instruction manual 4 Scout Pro Tools zip 5 Set of Feeler gauges ranging from 0 40mm 0 16in to 0 65mm 0 026in 6 Micro sized alligator clip 1 3 2 Standard Tools and Test Equipment List 1 Standard Electronics Tool Kit 2 Digital Voltmeter DVM Input impedance of at least 10 megohms in the 1 Volt dc position 3 Masses totaling up to 6000 grams are required Ohaus makes various calibration sets available Please contact your nearest Ohaus dealer for further details 1 4 TEST MASSES REQUIRED The masses required to test the Scout Pro balances must meet or exceed the requirements of ASTM Class 4 Tolerance The calibration points are listed in Tabl
24. e 1 1 TABLE 1 1 CALIBRATION POINTS CAPACITY SPAN CAL POINT LINEARITY CAL POINTS 200g 200g 100g 200g 400g 200g 200g 400g 600g 300g 300g 600g 2000g 2000g 1000g 2000g 4000g 4000g 2000g 4000g 6000g 6000g 3000g 6000g 1 5 SPECIFICATIONS CHAPTER 1 INTRODUCTION Specifications for the Scout Pro balances are listed in Table 1 2 When a balance has been serviced it must meet the specifications listed in the table Before servicing the balance determine what specifications are not met TABLE 1 2 SPECIFICATIONS Capacity g 200 400 400 600 2000 4000 6000 Readability g 0 01 0 1 1 0 Repeatability Std Dev g 0 01 0 1 1 0 Off Center Loading g 0 01 0 1 1 0 Linearity g 0 01 0 1 1 0 Tare range To capacity by subtraction Over Range Capacity Capacity 90d Stabilization Time 3 seconds Operating Temp Range 50 to 104 F 10 to 40 C Power Requirements AC Adapter included 4 AA Batteries not included Item Numbers SPx202 SPx402 SPx401 SPx601 SPx2001 SPx4001 SPx6000 CHAPTER 1 INTRODUCTION CHAPTER 2 DIAGNOSIS 2 1 TROUBLESHOOTING This section of the manual specifies problem areas of the balance which can occur Information is contained to isolate specific problems using Table 2 1 Diagnostic Guide and Table 2 2 Error Codes Follow all directions step by step Make certain thatthe work area is clean
25. g and then the second mass value Place masses totaling this value on the balance and press the ON ZERO Off button Press and release the ON ZERO Off button The display will show C blinking and then donE followed by Lin APPENDIX B FACTORY CALIBRATIONS B 2 FACTORY CALIBRATION CONT 13 Repeatedly press and release the PRINT Unit button until the display shows END Press andrelease the ON ZERO Off button The balance will return to the weighing mode Press and hold the ON ZERO Off button until the display shows OFF Remove power from the balance Remove either the short on U9 or the short on the RS232 option Replace the cover B 3 APPENDIX B FACTORY CALIBRATIONS B 4 OHAUS 8 0 2 3 09 7 3 P N 80250973 SERVICE MANUAL SCOUT PRO ELECTRONIC BALANCES
26. malfunction Ifa problem arises that is not covered in this manual contact Ohaus Corporation for further information 2 1 CHAPTER 2 DIAGNOSIS TABLE 2 1 DIAGNOSTIC GUIDE SYMPTOM REMEDY No display No power Check AC Adapter Power Jack defective Replace Power Jack 2 3 Weak battery Replace 4 Battery connector poor 4 Clean or replace contact PC Board defective Replace PC Board Low BAT displayed Weak battery Replace battery AC Adapter defective or 2 Replace AC Adapter wrong type being used PC Board defective Replace PC Board Stays in segment check Weak battery Replace battery PC Board defective Replace PC Board Always displays zero Possible power surge Perform linearity calibra tion Down stop improperly set 2 Set per specifications Transducer not con Plug in Transducer nected Defective Transducer Replace Transducer PC Board defective Replace PC Board Cannot calibrate Incorrect calibration Use correct masses masses Transducer not con Plug in Transducer nected Defective Transducer ReplaceTransducer PC Board defective Replace PC Board Displays Err2 Missing Pan Put pan on balance Down Stop improperly Check stops and reset if set necessary 3 Transducer zero has shifted 3 Perform factory calibra tion B 1 or B 2 TABLE 2 1 CHAPTER 2 DIAGNOSIS DIAGNOSTIC GUID
27. nce 14 Replace the batteries if previously removed 15 See Appendix A Service Tools Instructions and load temperature compensation data 16 Check the performance of the Balance and perform Factory Calibration B 2 3 3 CHAPTER 3 REPAIR PROCEDURES 3 1 3 Transducer 8 Replacement There are 8 Transducer Kits that are available for replacement purposes Each Kitis fully assembled and consists of metal base plate a transducer mounted to the base plate and a subplatform mounted to the transducer All adjustments such up stop and down stop limits travel of the transducer to safe limits have been factory set Transducer kits are available in the following ranges 120g 200g 400g 600g 1200g 20009 4000g and 6000g Checkthe bottom of the balance and verify the capacity before ordering a new transducer kit CAUTION Extreme care must be exercised so as not to twist or deform the Transducer in any way Do not drop or hit the Transducer Any damage to the Transducer can render it inoperative 1 Remove the cover in accordance with the procedures in paragraph 3 1 1 2 Remove the 4 screws that secure the Transducer 8 to the Base 10 The screws are accessible at the bottom of the balance See Figure 3 4 TRANSDUCER MOUNTING SCREWS _10 BASE 8 TRANSDUCER TRANSDUCER CONNECTOR J6 MOUNTING E SCREWS LIA
28. ond to pressure on the platform Enter the balance serial number Click on OK Click on READ The balance should read the correct model and serial number Perform the factory calibration See B 2 The unit is finished Remove the RS232 option or the jumper on the customers RS232 option A 6 APPENDIX B FACTORY CALIBRATIONS B FACTORY LINEARITY CALIBRATIONS The Scout Pro service and factory linearity calibrations use three calibration points zero mid scale and full scale B 1 SERVICE CALIBRATION This calibration is used when an error 2 has been displayed by the balance The calibration is performed with no error checking and is saved as a user calibration It is not a factory calibration because no data is written to the EEPROM 1 2 9 10 Start with the unit off Press and hold both the ON ZERO Offand the PRINT Unit buttons until the display reads rAMP Press and release the PRINT Unit button The display will show Lin Press and release the On Zero Off button The display will show C blinking and then the first mass value Place masses totaling this value on the balance and press the On Zero Off button Press and release the On Zero Off button The display will show C blinking and then the second mass value Place masses totaling this value on the balance and press the On Zero Off button Press and release the On Zero Off button The display will show C blinking and then donE followed by Lin
29. t met adjust the screws on the base plate using the data in Table 4 4 See Figure 4 2 for location of adjustment screws DOWN STOP DOWN STOP ADJUSTING SCREW ADJUSTING SCREW Figure 4 2 Transducer Front View Down Stop Adjustment Screws 4 4 CHAPTER 4 TESTING 4 3 Down Stop Adjustment Cont TABLE 4 3 TEST MASS VALUES SPx202 SPx402 SPx401 SPx601 SPx2001 SPx4001 SPx6000 TABLE 4 4 TRANSDUCER ADJUSTMENT TOLERANCES SPx123 SPx202 SPx402 SPx401 SPx601 SPx2001 SPx4001 SPx6000 Min mm in 0 40 0 016 0 60 0 024 0 50 0 020 0 75 0 030 0 65 0 026 0 65 0 026 0 60 0 024 0 50 0 020 Max mm in 0 45 0 018 0 70 0 028 0 60 0 024 0 90 0 035 0 75 0 030 0 90 0 035 0 70 0 028 0 60 0 024 After the transducer has been adjusted assemble the balance retest and recalibrate CHAPTER 4 TESTING 4 6 CHAPTER 5 DRAWINGS AND PARTS LISTS 5 1 DRAWINGS This section of the manual contains an exploded view and parts lists The exploded view drawing is designed to identify the parts which can be serviced on the balance in the field NOTE In all cases where a part is replaced the balance must be thoroughly checked after the replacement is made The balance MUST meet the parameters of all applicable specifications in this manual If further technical information is needed in the United States call Ohaus Aftermarket toll free 1 800 526 0659 between 8 00 a m and 4 00 p m EST An Ohaus factory service te
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